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Online Tests
Chemistry Fsc Part 1 Chapter 4 Online Test MCQs With Answers
Question # 1
The shape of diamond crystal is.
Choose an answer
cubic
Hexagonal
Tetragonal
Orthorhombic
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Question # 2
In which system all the three axes are of equal length and all angles are at right angle.
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Cubic
Tetragonal
Orthorhombic
Hexagonal
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Question # 3
Which of the following elements in its crystalline form will have the lowest enthalpy change of vaporization
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Chlorine
Argon
Phosphorus
Silicon
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Question # 4
A pressure cooker reduces cooking time because.
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Heat is uniformly distributed
Boiling point of water rises
A large flame is used
Vapour pressure of liquid reduces
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Question # 5
In order to mention the oiling point of water at 110
o
C, the external pressure should be.
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Between 760 torr and 1200 torr
Between 200 torr and 760 torr
765 torr
Any value of pressure
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Question # 6
Which substances has diffused melting point.
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Crystalline solids
Amorphous solids
Metallic solids
Covalent solids
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Question # 7
In triclinic unit cell
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All axial lengths are equal
All internals lengths and angles are equal
Both axial lengths and angles are equal
Both axial lengths and angles are unequal
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Question # 8
Molecular crystals are generally
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Hard
Relatively soft
Unstable
do not exist
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Question # 9
When water freezes at 0
o
C, its density decrease due to.
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Cubic structure of ice
Empty spaces present in the structure of ice
Change of bond lengths
Change of bond angles
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Question # 10
The nature of copper crystals is
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Metallic
Ionic
Covalent
Molecular
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Question # 11
The boiling point of water at the top mount Everest is.
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59
o
C
69
o
C
83
o
C
75
o
C
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Question # 12
NH
3
shows a maximum boiling point among the hydrides of V-A group elements due to
Choose an answer
Very small size of nitrogen
Lone pair electrons present on Nitrogen
Enhanced electronegative character of Nitrogen
Pyramidla structure of NH
3
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Question # 13
Which pair of compound are isomorphic in nature.
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NaCl and KNO3
KNO3 and MgO
MgO and NaF
CaF and CaCO3
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Question # 14
The repulsion of electronic clouds of the molecules are responsible for the attractive forces among the molecules. These forces are
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Dipole-induced dipole forces
Ion-dipole forces
Instantaneous dipole-induced dipole forces
Dipole-dipole forces
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Question # 15
Down the VII -A group, polarizability generally.
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Increases
Decreases
Remain constant
Negligible
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Question # 16
When water freezes at 0°C, its density decreases due to
Choose an answer
Cubic structure of ice
Empty spaces present in the structure of ice
Change of bond lengths
Change of bond angles
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Question # 17
The number of Na, ions which surround each CI
1-
ion the NaCI crystal lattice is
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8
12
6
4
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